/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.dubbo.samples.generic.call.impl;

import org.apache.dubbo.rpc.service.GenericException;
import org.apache.dubbo.rpc.service.GenericService;

import java.util.concurrent.CompletableFuture;

public class GenericImplOfHelloService implements GenericService {
    @Override
    public Object $invoke(String method, String[] parameterTypes, Object[] args) throws GenericException {
        if (method.equals("sayHello")) {
            System.out.print("executing sayHello.");
            throw new RuntimeException("sayHello: throws exception");
        } else if (method.equals("sayHelloAsync")) {
            System.out.print("executing sayHelloAsync.");
            return CompletableFuture.completedFuture("sayHelloAsync: hello " + args[0]);
        } else {
            try {
                return defaultOperation(method, parameterTypes, args);
            } catch (Exception e) {
                throw new GenericException(e);
            }
        }
    }

    private Object defaultOperation(String method, String[] parameterTypes, Object[] args) throws Exception {
        throw new UnsupportedOperationException("method does not exist.");
    }
}
